Hermann bernhard feldmann



HERM ANN BERNI-IARD FELDMANN,

PATENT OFFICE.

OF PHILADELPHIA, PENNSYLVANIA,

ASSIGNOR TO JOSEPH R. TASKER, OF SAME PLACE.

PULVERIZING-MACHINE.

SPECIFICATION forming part of Letters Patent No. 290,874, dated December 25, 1883.

Application filed July 16,1883. (No model.)

I all whom it may concern:

Be it known that I, HERMANN BERNHARD FELDMANN, of the city and county of Philadelphia, and State of Pennsylvania, have invented certain Improvements in'Pulverizing- Machines, of which the following is a specification.

My invention, broadly considered, relates to and embodies improvements upon a certain novel pulverizing-machine invented by VVilliam Henry Thompson, of Islington, county of Middlesex, Kingdom of Great Britain, and patented to him in and by Letters Patent of the United States No. 249,489, dated Novem- I 5 her 15, 1881, to which Letters Patent reference is to be made for a more clear comprehension of my present improvements.

It also relates to and embodies improvements upon certain patented inventions which are innorovements upon the Thompson machine, and are hereinafter mentioned.

In view of the above fact, and in order to a better comprehension of my present invention, I regard it as necessary to briefly de- 2 5 scribe the several inventions upon which my present is an improvement.

Broadly stated, Thompsons invention consists in the combination, within a suitable inclosing-case embodying in its own structure a vertically-erected hollow circular track, of

an independent sphere or ball adapted to revolve around the casing, and of giving means for imparting to the ball not only revolution around the casingtrack, but also rotation 3 5 about its own axis. In the Thompson machine, as also in mine, material to be pulverized is fed through a hopper into the casing, and is crushed by the combined revolution and rotation of the sphere or ball. The means em- 4o ployed by Thompson for effecting the com- 'bined movement of the ball are a pair of vertically-erected disks provided with peripheral beveled bearing-surfaces, and arranged face to face at some distance on either side of thecenter of a shaft horizontally journaled through the casing, and by which they are revolved.

' The disks are capable of rocking movements by virtue of being each loosely hung or supported on the shaft between two collars hav- 5o ing curved bearing-faces. The collars prevent I a lateral movement of the disks at their center. The operation of the disks and ball is described by Thompson in the following language, which also I regard as of importance to restate here,in order that amore thorough com- 5 5 prehension of my improvements may be had. Thompson says: The operation of the disks and ball is substantially as follows: Vhenthe disks are revolved, their tendency is to as sume a position exactly at right angles to the shaft; but as they cannot do this for the reason that the diameter of the ball at the point of contact exceeds the distance between the adjacent bearingfaces, it follows that they bear or press upon the ball in their effort to assume this position, and crowd the latter against the casing with greater or less force, according to the rapidity of the revolution. The disks, also, by the friction of the contact, carry the ball with them in their revolution about the casing, and thus communicate to it a centrifugal action. The ball, then, it will be'understood, is caused to act upon the material to be pulverized with a resultant force, which is obtained from three distinct sources, as follows: first, the direct radial thrust which is received from the efforts of the disks to assume a position at right angles to the shaft, the bearing-faces of the same acting as inclined planes to crowd the ball against the inner sur face'of the casing; second, the centrifugal action which results from the rapid revolution of the ball around the casing, and, third, the grinding action which results from the rotation of the ball upon its axis. By adapting the disks to rock upon the shaft the ball is permitted to move on radial lines to and from the shaft, according to'the amount of material in the casing, without being free at any time from the action of the disks.

My invention also relates to and embodies in its structure certain improvements upon the pulverizing-machine invented by me and pat ented to me in and by Letters Patent of the United States No. 265,791, dated October 10, 1882, to which Letters Patent reference is also to be made for the more clear comprehension of my present improvements. Among other features of construction,my abovenamedmachine embodies two sleeve-journals, described IOO 2 asasm as of Parrott-gun form, applied to and rigidly connected with the shaft, upon the rounded 'breeches of which sleeve-j ournals the disks are seated,free to yield or rock to accommodate themselves to any varying movement of the ball.

My invention also relates to and embodies in its structure certain improvements upon the wet-pulverizing machine invented by Stephen P. hi. Tasker, and patented to him in and by Letters Patent of the United States No. 265,718, dated October 10, 1882, to which Letters Patent reference is also to be made for a more clear comprehension of my present improvements. 'Among other features of construction, Taskers machine above named embodies the application to sleeve-journals of the character invented by me of clutch-lugs which are adapted to take into lug-seats formed in the rear face of the disks, and of proper size to permit of a rocking of each disk upon its sleeve-journal with respect to the clutch-lugs, and also embodies a spring between the disks.

My invention also relates to and embodies in its structure certain improvements upon the dry-pulverizing machine invented by the said Stephen P. M. Tasker, and patented to him in and by Letters Patent ofthe United States No. 265,715, dated October 10, 1882, to which Letters Patent reference is also to be made for a more clear comprehension of my present improvements. Among other features of construction, Taskers patented machine above named embodies disks without blades, and radially-disposed peripheral openings.

My invention also relates to,and preferably embodies in its structure, certain improvements upon the pulverizing-machine invented by the said Stephen 1. M. Tasker, and patent ed to him in and by United States Letters Patent No. 274, 050, dated March 18, 1883, to which Letters Patent reference is also to be made for a more clear comprehension of my present improvements. Among other features of con struction, Taskers patented machine above referred to embraces the provision of an improved casing andreceiver for the pulverized material, the casing being supported in the receiver, and the latter, embodying in its construction pedestals which support the shaft of the apparatus, embraces also an improved sleeve-j ournal, which is employed solely to support and actuate the disks, and not to constitute a device to assist in the journaling of the sh aft, the said sleeve-journals being made with straight muzzles, which are contained in stuffing-boxes applied to the screens, which simply serve as stuffing-boxes, and not as supporting devices for the shaft of the machine, which latter is, as stated, journaled in and supported by the pedestals of the receiver.

Generally stated, my present invention consists in an improved means of application of the disks to the sleeve-journals, whereby I am enabled to dispense with the spring between the disks heretofore in the above-mentioned improvements necessary.

In the accompanying drawings, Figure 1 represents in central vertical longitudinal sectional elevation a pulverizing-machine convert iently embodying a good form of myinvention, the ball or erushing-sphere and shaft being represented in elevation. Fig. 2 is a rear view of one of the disk face-plates, and Fig. 3 a rear elevational view of one of the sleeve-journals.

Similar letters of reference indicate corre sponding parts.

In the drawings, A represents the casing, B the receiver within which said casing is erected, 0 the pedestals which support the bearings for the shaft, D the shaft, E the ball-track, and F the ball or crushing-sphere. Any further description of these parts I regard as foreign to the purpose of this specification.

G are the disks, which are made without blades, scoops, or take-ups, or removable beveled bearing-plates, but which in other respects correspond to the disks described in Letters Patent No. 265,713, hereinbefore referred to.

K are the sleeve-journals, constructed with rounded breeches, upon which the disks seat themselves and move to accommodate the ball, and with straight muzzles of the character set forth in Letters Patent No. 274,050, hereinbefore mentioned. The central front face of each of the disks is excavated to form a circular recess, 9, in which is seated an annular cushion, H, of rubber or kindred elastic material, which cushion performs the office of a spring, as hereinafter fully described.

I are the disk face-plates, of suitable dimensions to fit over the front face of the cushions in place upon the disks and fitted to the shaft. The bore of each sleeve-journal is not only conformed to the section of the central portion of the shaft, but is also provided with longitudinal channels a, in which bolts J, which retain the faceplate and cushion against the front face of the disk, are seated. The face-plate is provided with a suitable number of countersunk holes, i, in which the heads of the bolts seat themselves. The extremities of the bolts, which are threaded, pass out to the rear of the longitudinal channels in the sleeve-journals, and the nutsj, which are screwed up on the bolts to tighten them against the faceplate and cush ion, are set in a socket, L, formed in the rear face of the muzzle of the sleeve-journal. It will now be readily understood that the cushions in the above-described arrangement of parts take the place of the spring between the disks heretofore necessary in the various improvements upon the Thompson device heretofore cited, and enable such rocking of the disks with respect to the sleeve-journals as is necessary to permit the ball to move on radial lines to and from the shaft, as in passing over irregular masses of material which it cannot at first crush, without permitting the ball at any time to be free from the gripping action of the disks.

M are two convergent inclines constructed in the lower portion of the casing A, and adapted to concentrate all the material within the casing upon the ball-track, so that every particle of the material fed into the casing must eventually be acted upon by the ball and crushed between the latter and the track.

It is obvious that the office of the face-plates and bolts is simply that of compressing the cushions in place against the face of the disks, and that the bolts may be formed with large heads, which would seat themselves so firmly and cover such area upon the face of the cushions as to render the face-plates unnecessary.

Other fastening contrivances adapted to compress the cushions upon the disks, and consequently the disks upon the sleeve-journals, may be substituted for the bolts. I simply instance the face-plates and bolts as the most con- 20 venient method of securing the desired result.

HERMANN BERNHARD FELDMANN.

In presence of J. BONSALL TAYLOR, JOHN JoLLnY, Jr. 

